5.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Christian Göttsche <cgzones@xxxxxxxxxxxxxx>
commit 70d91dc9b2ac91327d0eefd86163abc3548effa6 upstream.
Set the next pointer in filename_trans_read_helper() before attaching
the new node under construction to the list, otherwise garbage would be
dereferenced on subsequent failure during cleanup in the out goto label.
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: 430059024389 ("selinux: implement new format of filename transitions")
Signed-off-by: Christian Göttsche <cgzones@xxxxxxxxxxxxxx>
Signed-off-by: Paul Moore <paul@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
security/selinux/ss/policydb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -2011,6 +2011,7 @@ static int filename_trans_read_helper(st
if (!datum)
goto out;
+ datum->next = NULL;
*dst = datum;
/* ebitmap_read() will at least init the bitmap */
@@ -2023,7 +2024,6 @@ static int filename_trans_read_helper(st
goto out;
datum->otype = le32_to_cpu(buf[0]);
- datum->next = NULL;
dst = &datum->next;
}
